Adjustable scaffold



Sept. 30, 0- K. MARCINAUSKAS I 1,776,950

ADJUSTABLE SCAFFQLD I Filed Jan. 28, 1929 2 Sheets-Sheet 1 1 5 9 g\ A 5y 2 ''d g 9/4 ay Y V v V5 71:7

Kazz'mer Harcznauskqs A? Patented Sept. 30, 1930 i umrai) STATES PATENTOFFICE LKAZIMER.MARCIITJltUSKAS, OF CHICAGO, ILLINOIS ADJUSTABLESCAFFOLI) Application filed January 28, 1929. Serial No. 335,544.

This invention relates to an adjustable embraced Within the confinesofthe adjustscaffold adapted to be assembled and mountable scaffold. I v7 ed in position against the side of a wall or it is furthermore anobject of this invenbuilding to facilitate painting of the Wall or tionto provide an adjustable scaffold conmaking of repairs or the like, saidscaffold slsting of adjustable uprights having cages embracing frames orcages adapted to be forming a part thereof adapted to seat placedagainst the surface of the all and against the outer surface of a Wallwith said supported in position by means of adjustuprights beingprovided With blocks and able braces With said cages having uprightstackles to facilitate raising of a cross-beam 10 on the upper ends ofwhich blocks and tackles lnto a predetermined elevated position to aremounted and c nnected to a cr -b support a suspended saddle or seat in aposito facilitate raising the cross-beaminto an tion to permit thesaddle to be raised or lowelevated position to afford a suitable supportcred or moved transversely of the Wall to perf a ll Carriage on hi h addl t nntpainting or repairs to be made to differ- 15 is suspended bymeans of ropes and pulleys ent portions of the Wall betweenthe adjusttopermit the saddle to be raised or lowered e up lgnts and below theCross-beam on so that access to different portions of the Wall WhlCl}the fiaddle 13 ppo I v or building on which the'scalfold is engaged ItIS a P Q l 0f lllventloll may b dil h d to provide an ad ustablescaliold adapted 20 It i an bj t f thi i ti n t id to be removablyplaced against the-side of an adjustable scaffold adapted to be bracedng and hming a cl'ossheam which in position againstithe side of abuilding and y be used lowered to P p y "PG- havingan adjustable saddleWhich maybe traveling carriage soflmt Mhustable raised or lowered ormoved sidewardly in Saddle Supported by t 031111183 y be 25 i directionto permit a person i i i moved into dlfierent positions v tlnn the j thesaddle to have access to all portions of confines of the 11191110613 pthe Wall. of the building against Which the l l Q to Afford accessloscaffold is placed. I different portions of the Wall against which I isalso an Object of this invention to PM} the scaffold 1s placed so thatthe Wall may 30 vide an adjustable scaffold adapted to be rebe D d 'lmay be i all movably placed in position against the outer P of [he 1 r vi i ,2. 1. Wall of a building wlth said scaffold having @9 1 llmpolviumb j a c rose-beam adapted to be raised in position fillsll/911131011 fi ppf i from the to support a roller carriage onWhich-anad- Closures 1n the slwcmwtmn n the 35 justable saddle isengaged to permit a perf m wi a p 1 son to be moved into differentpositions ad- 3 i e i lm 15' c 3 N a jacen-t the VJltll of the buildingto facilitate m m m (1 m m ml )aintino' or re nirin of different r'tsmore fully desc'rlbed' lfi i s b r L On the drawings:

I 4 17 J. i 4 r i ni 'ure 1 lllllSlZl'dbG-S a fra 'mentar s1de 0 It IS afurther ob ect of this invention to 3 l elevation of a Wall=of abuilding having enprovide an ad ustable scaffold comprising a gagedtherefigainst an ilnpfoved. adjustable P f Cages 9 frames Whlch We adascallold embodying the principles of this in be seated. agalnstja' Walland supported in v gi I 45 Position ym n s s e extellSlble Figure 2 isan enlarged top plan view of braces Q F a -b m y l one of the side cagesor frames taken on into a predetermined position and held in 11 II II fFi ural,

SaidpQS PP a ladjutilble Sfld- "Figure 3 is a reduced side elevationalView dle in a positionpermitting a person to have taken on line III-IIIof Figure 2.

5 ready access to different portions'of -the Wall Figuret is a verticalsectional view taken on line IVIV of Figure 2 illustrating a portion ofa brace member in position and also showing a portion of the saddlesupporting beam seated in place.

Figure is an enlarged side elevation of the saddle supporting carriageengaged on a fragmentary portion of the beam supporting the same.

Figure (3 is an enlarged transverse section taken on line Vl-Vl ofFigure 5.

Figure 7 is a fragmentary side view of the middle portion of one of theadjustable brace members used to support one of the cages or frames ofthe sea field in position.

Figure 8 illustrates a fragmentary side view of a modified form ofadjustable brace member for use in supporting the cages or frames of thescaii'old in place.

As shown on the drawings:

The reference numeral 1 indicates the wall of a building which is eitherto be painted or repaired and against which an improved adj ustablescailold embodying the principles of this invention is engaged. Theadjustable scaffold comprises a pair of cages or frames each embracing aback 2 and two converging side walls 3 rigidly connected at their frontends to an upright t which is braced in position by means of transverseslotted frames or brackets 5 which extend rearwardly from the upright 4and are secured at their rear ends to cross members forming part of theback 2 of the cage. Formed on theupper portion of the back 2 of the cageis a socket or pocket (3 for the reception of the upper end of acollapsible brace comprising a plurality of brace members or poles '7and 8 which are connected together by means of a hinge 9 or othersuitable means to permit the brace members to be collapsed when not inuse. Engaged on the brace rods or members 7 is a loop connector or clampmember 10 which is adapted to be engaged over the end of the brace barlying adjacent the brace bar 7 to hold the brace members rigidly clampedtogether in the extended position illustrated in Figures 1 and 7.

The upper end of the top brace member 7 is projected through the slot ofthe brace frames 5 forming part of a cage with the upper end of thebrace member 7 projected into or seats in the socket 6 formed at theupper portion of the rear wall of the cage as illustrated in Figure 1.By this means the extended brace has the lower end thereof sea ed uponthe ground and the upper end engaged in the cage to hold the cage inapredetermined elevated position to permit the back of the rear wall 2 toseat flatly against the surface of the "all of the building 1.

Rigidly clamped by means of brace rings 11 or the like on the upper endof the front upright 1 of each cage is an extension shaft or pole 12provided with a notch 13 in the front side of the upper end thereof toafford a seat or pocket for one end of a transversely positionedcarriage supporting beam or bar 1 1.

The end of the cross-beam 15 has pivotally supported thereon. by meansof bolts 15 U-straps or hangers 16. Connected to the hangers 16 areropes 1'? vhich are engaged through blocks 18 which are supported on theupper ends of the vertical extension bars 12 and form a block and tacklearrangement whereby the cross-beam 1 1 may be raised and lowered bymeans of the ropes 1T. lVhcn the cross-beam 14 is raised to itsuppermost position by means of the ropes 17. said cross bar is adaptedto seat in the notches or pockets 13 of the upright extension bars 12 asillustrated in Figure -11. The cross-brain ll has stop blocks or cleats3i secured to the front side thereof to hold the cross-beam 11 againstshifting longitudinally or transversely of the upri hts 12.

Secured on the front faces of the u 'irights 12 adjacent the notches .13are brackets adapted to form pockets for the reception oi the cross-beam11. The brackets 35 hold the cr ssbcam in place seated in the notches13. The cross-beam 1 is adapted to be raised by means of the ropes 17 toa point above the brackets 35, after which the cross-bean'i moves towardthe uprights 12 and is lowered to seat behind the brackets 35 asillustrated in lfiigure at.

Pivotally mounted on the sides of each upright 12 is a fulcrumed releaseguide or arm 36 to one end of which a release rope or trip cable 37 isattached. hen it is desired to lower the cross-beam, it is first raisedout of the sockets 13 by means of the ropes 1.7 to clear the upper endsof the brackets 35. The release ropes 37 are now pulled to swing theguide arms 36 from the full line position of Figure 4t into the inclineddotted line position to close the sockets. The cross-beam 14 is nowlowered and slides omiwardly over the inclined guide arms 36 and overthe brackets 35, thereby permitting the crossbeam to clear the socketsand be lowered to the ground.

Movably supported upon the crossbeam 14 is a carriage 19 which straddlesthe crossbeam 1 1 and is provided with a pair of upper supportingrollers 20 which rotatably track upon the upper edge of the cross-beam1 1. Rotatably supported in the lower corners of the carriage 19 aresmall and large pulley wheels 21 and 22 respectively (Fig. 6). Rotatablysupported in an opening in each of the upright members 23 of thecarriage 19 is a guide roller 24. The guide rollers 24 are so positionedthat they track on the side surfaces of the crossbeam 11 therebyali'ording an arrangement whereby the carriage 19 may be easily run backand forth on the cross-beam.

Engaged over the two large pulley wheels 22 of the carriage and passingthrough a block 25 is a rope or cable 26. One end of the rope or cable26 is connected to one arm 27 of a saddle or chair 28, the other arm 29of which is hung on a hook 30 carried by the block 25 as illustrated inFigure l. A person seated in the saddle or seat 28 is thus permitted toraise himself by pulling on the rope or cable 26 thereby causing thesaddle to be raised or lowered as desired so that different portions ofthe wall 1 may be conveniently reached.

Figure 8 illustrates a modifiedform of extensible brace adapted for usein place of the brace illustrated in Figure 7 and comprising a pluralityof overlapping bars or poles 31, the overlapped portions of which arerigidly connected together by means of clamps or loop members 32whichare pivotally supported on one of said brace bars 31.

When the adjustable scaffold is tobe used, a pair of cages or frames2tare adapted to be raised on the upper end of a pair of braces 78 withthe lower ends of the braces seated against the ground so that the cagesor frames may be elevated a desired distance with the flat backs 2 ofthe triangular cages resting against the outer surface of the wall 1. Ahorizontal brace beam or sill 33 projects through the lower portions ofthe cages or frames 24 and rests on the lower bracket 5 of the cages asillustrated in Figure l and are secured to said cages to hold the sameproperly spaced one from the other. By manipulating the ropes or cables17, the cross-beam lt isadapted to be raised to seat in the brackets 35so that the carriage 19 is raised to a desired height with thecross-beam 14. VVith the cross-bea1n raised to seat in the brackets 35the saddle 28 is adapted to be raised off of the ground by propermanipulation of the cable or rope 26. The cross-beam 1% may now beraised above the level of the two supporting cages until said beampasses the brackets 35. The cross-beam 14 is new lowered to permit thecross-beam to pass the released guide arms 36 and seat in said notchesor sockets 13 behind the brackets to properly support the cariage at thedesired elevation. A person sitting in the sad dle 28 may thus elevateor lower himself and by using his feet on the wall may move the carriagetransversely so that the carriage will roll on the cross-beam 14. Inthis manner a person seated in the saddle 28 may cover all portions ofthe building wall .1

within the confines of the adjustable scaf-' fold so that the wall mayeither be painted or repaired as the case may requir It will thus benoted that quite a large area of a wall may be conveniently covered witha single positioning of the adjustable scaffold. If desired, theextensible braces 78 which support thecages or frames in position, may

be of the type illustrated in Figures 7 and 8, or if preferred, may beofa telescoping type or any other suitable form to satis- 'factorily bracethe cages in place against a wall.

Attention is directed to the fact that the improved adjustable scaffoldmay be conveniently adapted for use at elevations above the second,third or fourth floors of a building. By omitting the brace members, thecages 2% may be suppported on the window sills of the windows of abuilding with the rea. portions 2 facing inwardly and with the uprights4 andextensions l2 projecting upwardly on the outside of the building.The cages may be braced in position seated upon the window sills bymeans of cross bars projcctino' transversely through the rear portionsof the cages above the bracket members 5 to hold the cages properlyseated in position. By this means a pair of cages may be mounted in twodifferent windows with the uprights positioned in a convenient locationto permit the cross-beam lt to be raised in position and seated in thepockets 13 thereby conveniently supporting the saddle 28 in a suspendedposition at any desired elevation above the ground.

It will, of course, be understood that many changes may be made and thatnumerous de- 1 tails of construction may be varied through a wide rangeWithout departing from the principles of this invention and it istherefore not purposed limiting the patent granted hereon otherwise thannecessitated by the scope of the appended claims.

I claim as my invention:

1. An adjustable scaffold comprising a pair of cages, adjustablebracemembers for independently supporting the same in position against awall, extension members on said cages, block and tackle mechanismssupported on said extension members, a cross-beam supported by saidblockand tackle mechanisms, a carriage movably supported on saidcrossbeam, a saddle, and means adjustably supporting said saddle fromsaid carriage.

2. An adjustable scaffold comprising a pair of frames, adjustable bracemembers projecting upwardly through the bottoms of said framesfor-supporting the same agalnst a wall, a cross-beam, means forsupporting said cross-beam on said frames, a carriage movably mounted onsaid cross-beam and a saddle adjustably supported on said carriage.

3. An adjustable scaffold comprising a pair of adjustable uprightmechanisms adapted to be engaged against a wall, extensions secured onsaid mechanisms, a cross-beam, means for adjustably supporting saidcrossbeam on said extensions, a carriage movably supported on saidcross-beam, and a saddle adjustably supported from said carriage.

I An adjustable scaffold comprising a pair of frames,'adjustable bracemeans for supporting the same against a building, a brace memberconnecting said frames to hold the name in spaced relation, extensionson said 'l'rames, brackets thereon, a cross-beam, means on saidextensions for elevating said crossbeam into a predetermined position toseat in said brackets, and a saddle mechanism adjustably suspended fromsaid cross-beam.

57 An adjustable scatl old comprising a pair oi? cages, extensible bracemembers engaged in said cages to hold the same snipported at an elevatedposition above the ground and against a wall of a building, extensionson said cages, block and tackle means supported on said extensions, acrossbcam supported on said block and tackle means, a roller carriagemovably engaged on said cross-beam, rope and pulley mechanisms carriedby said carriage and a saddle supported by said rope and pulleymechanisms.

6. An adjustable scali'old comprising a plurality of cases adapted to bee .gaged against a wall of a building. adjustable brace members forindependently supporting each of the cages in position, a cross-beam.bracket members on said cages, means on said cages for raising thecross-bean'i to a predetermined position to permit the same to seat onsaid cages behind said bracket members, a roller carriage on saidcross-beam, and a saddle mechanism adj ustably arried by said rollercarriage.

7. An adjustable scafi'old comprising a pair of cages, adjustable bracemeans or supporting the same against a wall of a building, an adjustablecross-beam connecting said cages, a carriage movably mounter, on saidcross-beam and a saddle adjustahly supported on said carriage.

S. An adjustable scali'old comprising a cross-beam, adjustable bracemechanisms adapted to be supported on the ground and have contact with a*all of a building, means on said brace mechanisms for supporting thecross-beam in a predetermined elevated position, fulcrnmed members onsaid brace mechanisms to facilitate lowering ot' toe cross-beam, amovable carriage on said crossbeam. a. saddle, and adjustable 11' ansconnecting said saddle with said carriage to permit the saddle to beelevated and lowered to afford ready access to different portions of thewall against which the scatiold is engaged.

9. An adjustable scatiold comprising a pair of cages adapted to beseated against a wall, adjustable braces for supporting the cages inposition, a brace member connecting said cages one to the other, notchedextensions on said cages, brackets secured on said extensions, block andtackle means supported on said extensions, a. cross-beam supported bysaid block and tackle means adapted to be lowered into said brackets, a.carriage movably mounted on said cross-beam, a saddle, pulley wheelsmounted on said carriage, a rope engaged on said pulley wheels andconnected to said saddle to permit the saddle to be raised and loweredwith respect to said cross-beam to ali'ord ready access todil'lerentportions of the wall on which the scatfold is engaged, memberson said extensions, and means for operating said members to facilitatelowering of the cross-beam.

10. An adjustable scatl'old comprising a pair of cages, uprights forminga pa rt thereof, adjustable brace members engaged in said cages to holdthe same supported at a predetermined distance above the ground andseated against a wall of a building, a crossbeam, means on said uprightsfor raising the cross-beam to a predetermined position to permit thesame to be supported on said uprights, brackets on said uprights to holdthe cross-beam in its elevated position, a saddle adjustably supportedfrom said cross-beam and adapted to be moved both vertically andhorizontally with respect to the wall to a'l'- ford access to ditlerentportions ot the wall, trip members fulcrumed on said uprights. and meansfor actuating said trip members when the cross-beam is raised toposition said trip members to guide the crossb am downwardly past saidhooks when it is desired to lower said cross-beam.

11. An adjustable scali old con'i iirising a pair of cages, means forconnecting the same, brace members for supporting the cages against awall at a predetermined distance from the ground, a cross-beam, stopbloc-1s on said cross-beam, means on said cages for adjustablysupporting the cross-beam at a 'n-edetcrmined elevation from the ground,t'ulcrumed means on said cages iermitting release and loweril'ig ot thecross-beam. a supporting member movablv mounted on said cross-beam, asaddle thereon tor carrying a person, and means for adjustablysupporting said saddle from said mo *ahly supporting member to permitthe saddle to be adjusted with respect to the "all on which the scatlold is mounted.

In testimony whereof I have hereunto subscribed my name at Chicago, CookCounty, Illinois.

KAZHTER MARCINAUSKAS.

